Amsoil PSF in a Dexron III Application

[DV0993]

Hi all,

After replacing my power steering reservoirs on my RX330 and LS430, I have come to realise I am using Amsoil PSF which is not rated for these vehicles (they take Dexron III).

I have been using amsoil PSF for 4 years in both vehicles with no apparent negative effects.

Keen on the community's thoughts on whether switching to ATF is required.

 

[charbaby]

I believe that PSF is essentially ATF. However, I can't answer for Amsoil PSF.

 

[Boomer]

I think you answered your own question. Four years and n problems? Keep on doing what you are doing!

 

[zrxkawboy]

I would continue using the PSF. (BTW, there's no "t" in Dexron.)

 

[Astro14]

Keep using the AMSOIL. It’s the same viscosity as the Dexron, but doesn’t have the ATF additives, including the red dye.

 

[DV0993]

I would continue using the PSF. (BTW, there's no "t" in Dexron.)

Thanks! So strange my brain seemingly always thought there was a t!

 

[SC Maintenance]

If its the same viscosity I would continue using it. Power Steering fluid is simply a hydraulic fluid in any application I have seen - possible in these newer variable systems they have some sort of additional function?

 

[Pablo]

Hi all,

After replacing my power steering reservoirs on my RX330 and LS430, I have come to realise I am using Amsoil PSF which is not rated for these vehicles (they take Dextron III).

I have been using amsoil PSF for 4 years in both vehicles with no apparent negative effects.

Keen on the community's thoughts on whether switching to ATF is required.

What years are your Lexi?

It's interesting that Toyota recommends an (essentially) defunct spec fluid. So "defunct" that Amsoil no longer lists it in the PSF tech sheet.

So, indeed no problem.

 

[Astro14]

If it helps, I have been using the Amsoil PSF in my 2016 Tundra since it was new. It also lists Dexron III for power steering fluid.

The Amsoil is straw colored, just like the Toyota fluid, and same viscosity as the Dexron III specification.

It’s all good.

 

[ka9mnx]

It's interesting that Toyota recommends an (essentially) defunct spec fluid. So "defunct" that Amsoil no longer lists it in the PSF tech sheet.

Dexron/Mercon is still available as SuperTech ATF. My Ranger and 4Runner specs it. I'm using M1 ATF in the trans and SuperTech ATF in the power steering. It's sold in 4 quart jugs so I'm good for a while!

 

[DV0993]

What years are your Lexi?

It's interesting that Toyota recommends an (essentially) defunct spec fluid. So "defunct" that Amsoil no longer lists it in the PSF tech sheet.

So, indeed no problem.

Hi Pablo,

Both a 2000 LS430 and a 2005 RX330. Thanks for confirming!